Greetings,
I currently have a situation where I have decided against raid mirroring
for several reasons, primarily because I always want a snapshot of a
previous day on a second drive. I am looking for some best practice
advice on how this should be done. I'd like to hear some better ideas
if you all have any:
System: Centos 4.4 (Maybe 5)
Disks: /dev/sba,/dev/sdb (Identical 36GB SCSI)
Goals: After initial image, the machine should stay online during
nightly sync. If the primary drive fails, restore should be a matter
of removing the primary drive and replacing it with the backup drive.
1) Image complete system to rescue drive using bootable cd (dd
if=/dev/sba of=/dev/sdb)
2) Create rsync script that does the following:
mount rescue (mount /dev/sdb /rescue)
rsync primary drive to rescue drive (rsync -ax --delete --force
--exclude /rescue / /rescue/)
unmount mirror (umount /rescue)
3) Add script to cron daily.
Almost seems too simple, that scares me! ;) I can't help but wonder if
'drbd' could do this this more efficiently
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